Any experiences with the Bosch AE 125 (Electric) Tankless?

Does anyone have any info regarding this unit's reliability? Are there better options for electric tankless water heaters? There's no gas available so I need to stick with electric.

This is the only unit I could find that, at least on paper, meets my needs - from a recognizable brand name. Of course, I don't recognize the brand for their expertise in water heaters, so I'm willing to consider other brands.

Much better electric tankless out there like the Dolphin, Seisco, and Stiebel Eltron.

Many units like the Dolphin has some sort of pulsing control of the elements that prolong life and stage much better for varying flow changes.

The Bosch are plastic and Ive seen and heard even more about the housing(s) failing.

3- 40A double pole circuits is alot to give or even have available.

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Should have added the application in the original post. This is for a barn with a shower, 2 sinks, and (biggest load) a horse wash stall. Only one application at a time, but would rather over size if the unit can stage the heating - and I'd like approx. 5 gal a minute capacity if possible - for the horse stall.

I specifically added a 200 amp service instead of 100 amp because of the requirements of this model.

Much better electric tankless out there like the Dolphin, Seisco, and Stiebel Eltron.

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I'll check those out. I shied away from brands I hadn't heard of out of fear that they were just some fly-by-night outfit that decided to start importing appliances from China. If these companies have some history with this product, that's good enough for me. Any models specifically that are comparable in capacity - and at least close in price - or should I expect to spend more than the Bosch in order to improve the reliability?

their are stories of homes that pulled so much juice that the rest of the homes around them that were hooked up to the same transformer, all their lights dimmed when the tankless unit called for power....

stick with a normal 50 gallon tank type heater and put a blanket on it....

their are stories of homes that pulled so much juice that the rest of the homes around them that were hooked up to the same transformer, all their lights dimmed when the tankless unit called for power....

stick with a normal 50 gallon tank type heater and put a blanket on it....

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How does a 50 Gallon tank - even with a blanket help in this situation?

I really don't want to heat water for 20 days so that it is available on the 21st day when I need it. And I want to be able to wash more than half a horse at a time.

If I could make a tanked heater work without being extremely wasteful because of it being used so infrequently, I'd be all for it.

if you are only going to use the unit once every 20 days or so, would it be possible just towrap the heater, then turn off the breaker to the heater or add ashut off for the power by the heater??

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I have no allegiance to tankless - in fact, I'd prefer not to use one. However, I can't find a way to get the volume of hot water I need to wash my horses without draining the tank. I have no problem disconnecting the water heater when not in use, or waiting a couple hours for an 80 gallon heater to warm up. I do have a problem if I drain the tank in the middle of washing a horse and have to wait another recovery period in order to finish.

Still researching the possibility of simultaneous operation of the dual elements in a tank design, and trying to find out the recovery time - but there's very little info out there.

However, I can't find a way to get the volume of hot water I need to wash my horses without draining the tank.

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A 2 GPM shower = 16# of water per minute
Raised 50F would take 800 BTU/min = 48,000 BTU/hr = 14 kw. Most water heaters use 9 kw.

You'd need 60 A @ 240v and this would leave the water temp in the tank the same as it was before the shower, so this is a max and it's what a tankless would draw, if I haven't made any arithmetic mistakes.

A 2 GPM shower = 16# of water per minute
Raised 50F would take 800 BTU/min = 48,000 BTU/hr = 14 kw. Most water heaters use 9 kw.

You'd need 60 A @ 240v and this would leave the water temp in the tank the same as it was before the shower, so this is a max and it's what a tankless would draw, if I haven't made any arithmetic mistakes.

How many gallons of how hot water do you need?

What is the lowest incoming water temp?

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Not sure how many gallons - but it'll be far in excess of 2 GPM. I'll have a non-restricted 3/4" supply of hot and cold to the mixing valve and a virtually unrestricted sprayer. It takes about an hour per horse, and while the usage is pretty heavy, it isn't constant.

Not sure how many gallons - but it'll be far in excess of 2 GPM. I'll have a non-restricted 3/4" supply of hot and cold to the mixing valve and a virtually unrestricted sprayer. It takes about an hour per horse, and while the usage is pretty heavy, it isn't constant.

Power isn't an issue - I have plenty available.

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First cut: 80 gals @ 160 F combined with 80 gals @ 50 F gives you 160 gals @ 105 F.
How cold can the shower be?
Will 160 gals wash one horse?
Once the BTU/hr output is established there are many ways to supply this many BTUs input over hours or days preceding the shower. The heat can be stored in water or iron or whatever. You probably want to stay under 160 F for water but with iron you can pretty well heat it as hot as you need.